1,4-Benzenedicarboxylic acid, 1,2-ethanediol, 2,5-furandione, hexanedioic acid polymer, compd. with sulfurous acid, monopotassium salt 1,4-Benzenedicarboxylic acid, polymer with 1,2-ethanediol, 2,5-furandione and hexanedioic acid, sulfite, potassium salt 68647-27-8